package com.athl.netty.netty.simple;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

/**
 * @author hl
 * @Data 2020/8/31
 */
public class NettyClientHandler extends ChannelInboundHandlerAdapter {

    /**
     * 当通道就绪时 触发
     *
     * @param ctx
     * @throws Exception
     */
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        System.out.println("client ctx=" + ctx);
        ctx.writeAndFlush(Unpooled.copiedBuffer("hello,服务端", CharsetUtil.UTF_8));
    }

    /**
     * 当通道读取事件时，会触发
     *
     * @param ctx
     * @param msg
     * @throws Exception
     */
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf byteBuf = (ByteBuf) msg;
        System.out.println("服务器回复的消息=" + byteBuf.toString(CharsetUtil.UTF_8));
        System.out.println("服务器地址=" + ctx.channel().remoteAddress());
    }

    /**
     * 异常发生后
     *
     * @param ctx
     * @param cause
     * @throws Exception
     */
    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        ctx.close();
    }
}
